Creating depth specific contours from bathymetry data
27 visualizaciones (últimos 30 días)
Mostrar comentarios más antiguos
Leon
el 24 de Ag. de 2021
Comentada: Adi Purwandana
el 5 de Mzo. de 2023
The bathymetric data are available through NetCDF, Data GeoTiff and ESRI ASCII raster formats: https://www.gebco.net/data_and_products/gridded_bathymetry_data/#global
What is the best format Matlab can handle? How could I use them to generate contours at a specific depth, say 200 meters?
My ultimate goal is to create land/sea masks so that I can turn data on land to NaNs. Such masks would require the the lon lat pairs to be in a closed loop, i.e., the starting lon lat pair needs to be identical to the ending lon lat pair. Depending on the locations, multiple such loops would needed, e.g., one island would need to have its own lon lat loop.
It is my first time to process bathymetric data, and any tips would be greatly appreciated.
Many thanks!
0 comentarios
Respuesta aceptada
KSSV
el 24 de Ag. de 2021
You can save the file in the .nc format. MATLAB has functions like ncdisp to view the conntents of nc file and ncread to load the variables. Once you have lon, lat, depth into workspace; you can use contour to get your depth related contours,
If X, Y, Z is your data.
h = contour(X,Y,Z,[200 200]) ; % you need to mention levels in contour
2 comentarios
Adi Purwandana
el 5 de Mzo. de 2023
Anyway, is it possible to extract specific contour so that can speed up the running process... I felt its to big to involve all levels contour.
Más respuestas (0)
Ver también
Categorías
Más información sobre Map Display en Help Center y File Exchange.
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!